2111221019 has 2 divisors, whose sum is σ = 2111221020. Its totient is φ = 2111221018.

The previous prime is 2111221003. The next prime is 2111221031. The reversal of 2111221019 is 9101221112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2111221019 - 2⁴ = 2111221003 is a prime.

It is a super-2 number, since 2×2111221019² = 8914508382134796722, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2111221069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055610509 + 1055610510.

It is an arithmetic number, because the mean of its divisors is an integer number (1055610510).

Almost surely, 2^2111221019 is an apocalyptic number.

2111221019 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111221019 is an equidigital number, since it uses as much as digits as its factorization.

2111221019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 2111221019 is about 45948.0251915139. The cubic root of 2111221019 is about 1282.8559721779.

The spelling of 2111221019 in words is "two billion, one hundred eleven million, two hundred twenty-one thousand, nineteen".